Datasheet

© 2007 Microchip Technology Inc. Preliminary DS39625C-page 283
PIC18F2585/2680/4585/4680
REGISTER 23-6: TXBnSIDH: TRANSMIT BUFFER n STANDARD IDENTIFIER REGISTERS,
HIGH BYTE [0 ≤ n ≤ 2]
REGISTER 23-7: TXBnSIDL: TRANSMIT BUFFER n STANDARD IDENTIFIER REGISTERS,
LOW BYTE [0 ≤ n ≤ 2]
REGISTER 23-8: TXBnEIDH: TRANSMIT BUFFER n EXTENDED IDENTIFIER REGISTERS,
HIGH BYTE [0 ≤ n ≤ 2]
R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x
SID10 SID9 SID8 SID7 SID6 SID5 SID4 SID3
bit 7 bit 0
bit 7-0 SID10:SID3: Standard Identifier bits (if EXIDE (TXBnSIDL<3>) = 0)
Extended Identifier bits EID28:EID21 (if EXIDE = 1).
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
R/W-x R/W-x R/W-x U-0 R/W-x U-0 R/W-x R/W-x
SID2 SID1 SID0
— EXIDE —EID17EID16
bit 7 bit 0
bit 7-5 SID2:SID0: Standard Identifier bits (if EXIDE (TXBnSIDL<3>) = 0)
Extended Identifier bits EID20:EID18 (if EXIDE = 1).
bit 4 Unimplemented: Read as ‘0’
bit 3 EXIDE: Extended Identifier Enable bit
1 = Message will transmit extended ID, SID10:SID0 become EID28:EID18
0 = Message will transmit standard ID, EID17:EID0 are ignored
bit 2 Unimplemented: Read as ‘0’
bit 1-0 EID17:EID16: Extended Identifier bits
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x
EID15 EID14 EID13 EID12 EID11 EID10 EID9 EID8
bit 7 bit 0
bit 7-0 EID15:EID8: Extended Identifier bits (not used when transmitting standard identifier message)
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown